A second number without a second SIM is a data-network phone number: it works wherever your phone has internet, and it is a worse number than the one on your line. Good for marketplaces, deliveries and job applications. Bad as the account key for anything you might need to recover later.
TextNow is the app most people land on, so this page uses it as the worked example — but the trade-off is the same for every app in this category.
area code chosen · marked “free” in the picker · a number from the vendor’s own store image, not a live line
What you are actually gettingA number that rides on your internet
TextNow describes the offer without hedging, and the wording is worth reading closely because the word “free” is doing a lot of work:
TextNow, from its own app-store description.
Same description.
That second sentence is the whole business model in one line, and it is the answer to the question people ask after a week: why is there a banner in my phone app. You are not the customer of a free line; you are the audience for a paid-for one. The company also states the way out: “If you don’t want ads, upgrade to the Plus Plan or Unlimited Plan to remove them.”
Where it helpsFour jobs a second line does well
Selling something to a stranger
Your real number goes in a listing, and the listing outlives the sale. A line you can drop is worth more than the money it saves.
Deliveries and pickups
Drivers and couriers text. That is a contact you do not want permanently attached to your name.
Job applications
Recruiters call repeatedly, for months, about a role you may not take.
A work line on a personal phone
TextNow pitches exactly this: it lists the second number as being for private calling and texting, a separate business line. A separate number is not the same as a separate, managed account — the work traffic is still on your handset.
Same description, quoted with its own capitalisation because it is a heading in the listing.
Where it bitesThree failure modes, in order of how much they cost
| Failure | Why it happens | What to do instead |
|---|---|---|
| A code never arrives | Your bank, employer or government service may not accept numbers from app-based providers, and texts between carriers do not always complete | Never make an app number the only contact on an account you will need to recover. Give the real line and keep the app line for strangers |
| You lose the number | A number tied to a free, ad-funded line is not yours in the way a carrier line is; inactivity, an app change or an account problem can take it | Do not print it on anything that outlives the app. Treat it as temporary by default |
| Calls need data | The line rides on internet, so a weak connection is a dead phone — and the listing itself frames it as a free phone service, not a backup for voice coverage | Keep your real line active for anything urgent, and do not route an emergency call through an app you hope has signal |
Emergency calls. TextNow’s description, as retrieved for this article, does not state what happens if you dial emergency services from the free line. That is the single most important question in this category and the answer is not on the listing — read the app’s own safety pages before you rely on the number as your only phone.
How long an unused number stays yours. The listing says nothing about inactivity. Ask the app directly if you are planning to print the number anywhere.
CostWhat is free, and what the paid tiers change
The listing states plainly that “There are no yearly or monthly fees to use TextNow.” — the free plan is unlimited talk and text on the company’s network, funded by the ads in the app. The paid plans change two things: they remove the ads, and they add data. International calling is priced separately, and the listing gives a rate floor: “low-cost international calls to 230+ countries, with rates starting at less than $0.01 per minute.”
Free plan
Talk and text on the company’s network; ads in the app, as its description states.
Plus plan
Adds data with the streaming and gaming exception the listing names, and removes ads.
Unlimited plan
Data without the exception. Buy this only if you actually need a data line, not to kill ads.
The real cost
Reliability of a number you do not own. If it disappears, every account that used it as the recovery route disappears quietly with it.
Set it upFive minutes, in the right order
- Pick an area code that matches where you are calling from. People screen calls from an unfamiliar code, and that defeats the point of the number.
- Take a screenshot of the number you chose, and note the date. If the line is ever lost, you need to know what you had.
- Turn off the sync that copies this app’s messages into your main message history, if your phone offers it. Two numbers in one inbox is how you end up replying to a stranger as yourself.
- Use it only where a stranger needs to reach you. Bank, employer, government and medical: real line.
- Re-check it once a month for the first few months. If a code you were expecting never arrived, you want to know that now and not during a password reset.
Our page for the app, with its feature list and screenshots, is here. If you want a second number that behaves more like a real line, the cheaper version of this decision is usually a second plan on your existing carrier rather than a free app.
- Every quoted sentence about plans, ads, the second-number use case and international rates — the app description TextNow supplies for its own store listing, retrieved from the store’s public catalogue interface and checked word for word against this page.
- Two store images — supplied by TextNow and served by the store. Captions describe what is actually in the frame, including the countdown in the number picker; the digits shown there are the vendor’s sample content and are not live lines we tested.
- Not obtained — the app’s own pages on emergency calling and number inactivity, which is why those are posed as questions rather than answered.
- Our own judgement — the three failure modes, the order of the setup steps, and the recommendation to keep an app number off anything you might need to recover. We did not obtain a number or place a call for this article.
Written by the Dlzer editorial desk. Not affiliated with, endorsed by or sponsored by TextNow. The app and its marks belong to their owner and are used here to identify the product; quoted lines are the company’s statements about itself, not our claims.